Locking attachment for valves.



0. A. PATfERsoN. LOCKING ATI'ACHWIENT FOR VALVES.

APPLICATION FILED DEC. I2, 1914.

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in I l1'. u K/ f3 am a mi i" THE NORRIS PETERS COI, PHOTO-LITHO., WASHINGTON, D. C

CHARLES A. PATTERSON, OF BALTIMORE, ERNEST B. CLARK AND ONE-THIRD TO MARYLAND.

MARYLAND, ASSIGNOR OF ONE-THIRD T0 HARRY C. HAZARD, BOTH OF BALTIMORE,

LOCKING ATTACHMENT FOR VALVES.

Specification of Letters Patent.

Patented J une 22, 1915.

Application led December 12, 1914. Serial No. 876,862.

To all whom t may concern:

Be it known that I, CHARLES A. PAarnR- SON, a citizen of the United States, residing at Baltimore city, State of Maryland, have invented certain new and useful Improvements n Locking Attachments for Valves, of which the following is a specification.

This invention relates to locking attachments for rotary valves, and has been designed with special reference to locking the turning plugs of gas heating or lighting systems.

The invention has for its objects a valvelocking attachment which may be readily applied to the valves of, say, gas stoves or ranges without removing the same from an apartment; and further, such an attachment constructed for adjustment to t various sizes of valve casings; and further, such an attachment constructed to positively lock a valve or plug in any one of a number of positions, from shut to full open, against movement in either direction.

lWith these and minor objects in View, the invention consists in novel features of construction, and combinations which will be first described in detail, and then claimed in the closing clauses of this specification.

In the accompanying drawing: Figure 1 is a top plan view of a valve lock embodying my invention, shown in position on the valve casing of a stove or range: Fig. 2 is a view in elevation, of the same: Fig. 3, is a sectional view taken on line 3-3 of Fig. 2: Fig. 4 is a perspective view ofthe locking attachment frame detached from the valve casing: Fig. 5 is a transverse section taken on line 5-5 of Fig. 3, and Fig. 6 is a transverse section taken on line 6-6 of Fig. 3.

Reference characters correspond in the designation of parts in the several figures.

'Ihe supply pipe A for a range, or other device, and the valve casing B are of usual construction, the casing, in the instance shown, being connected directly with the supply pipe, but a short length of tubing may be interposed between the pipe A and the casing B, as is usual in some cases. The casing is provided with the usual throughway or passage C, and jet nozzle D, and with a turning valve or plug E, seated within the barrel F, having a through port e to register with the passage C, said parts being of usual construction and forming no part 0f my invention, except in combination with the valve locking devices now to be described, and referring now more particularly to Fig. 4c.

Two clamping plates, 1 and 2, are adjustably mounted at a suitable distance apart upon two long screw-bolts 3 preferably of slow pitch, their adjustment being effected by nuts t threaded on said bolts above the plate 1, and nuts 5 threaded on said bolts below the plate 2. These plates 1 and 2 are provided midway between the bolt apertures with saddle blocks formed of lugs 6 having in their faces recesses 7 shaped to partly embrace the Valve casing adjacent to its barrel F.

An L-shaped plate 8 is iXedly mounted beneath the heads of the screw bolts 3, being clamped thereagainst by nuts 9, one leg of said plate being curved to a proper. arc and provided with an outwardly facing segmental rack 10.

In the instance shown, plates are ring shaped to fit over the barrel of a valve casing, the bolt apertures being formed in ears 11 extended out from the body of the rings; this being a construction convenient, attractive in appearance and of low cost, as they are counterparts and may be cast in the same mold in the event of being made of cast metal, but it is apparent that the ring like form is not essential as the major part of the rings might be dispensed with and the apertured ears and the bridge carrying the saddle blocks form an effective clamp.

The head of the valve plug is provided with a tapped opening and a key-way 12 is formed through the threads (see Fig. 6) and a screw plug 13 is threaded in said opening and locked against rotation by a short key 14 engaging the key-way 12 and a groove 15 formed in said screw-plug.

A handle 16 has a tubular socket 17 at one end which fits freely the unthreaded end of the screw-plug 13 and it is provided interiorly with a feather 18 which engages the groove 15 of the screw plug and prevents rotation of the handle on said plug. The handle at its outer end is provided with an elongated recess 19 preferably cylindrical, within which is seated a coiled compression spring 20, the inner end thereof abutting on the bottom of the recess while its outer end rests against the head of a the clamping screw 21 which is threaded into a tapped hole in the screw plug 13 and holds these parts in proper rotation. EXteriorly the handle 16 is provided with a fiat locking pin 22 adapted to fit between the teeth of the segmental rack 10 (Fig. 3) and thus lock the valve in various positions of adjustments between the limits of movement which in the instance shown is controlled by a stop-pin 23 projecting from the valve and traveling in a recess 241 formed in the top margin of the barrel F and terminating in abutments 25 and 26.

The plug is tapered to fit the tapered bore of the barrelF of the casing and its lower end, beyond the barrel is reduced in diameter and encircled by an expansion spring 27 kabutting at one end on the end of said barrel, and at theother end on the head of a screw 2S threaded into the lower end of the plug E. This is a usual construction, but advantageous in this case as an ordinary plug can be removed from the casing and taken to a shop to have it fitted for the special handle here shown, or as these parts are made to standard a special plug may be substituted for an ordinary one.

rlvhe gas ow can be nicely regulated by flaring the port e at the ends to meet thev requirements of a user.

rlhe valve plug shown is of that class having a head with a threaded aperture to receive a removable handle, but it will be understood that the integral handle of a plug may be cut oii to proper length, then turned down to it the socket 17 of the spring-prsed handle, then tapped to receive the threaded end o the screw 21.

claim: i

1. A locking attachment for valve plugs consisting of a pair of clamp-plates, clampbolts, a segmental rack carried by said bolts, a valve plug and a spring pressed handle connected with the plug and carrying a locking pin to engage said rack. A

A 2. A locking attachment for valve plugs consisting of a pair of clamp-plates, clampbolts, a segmental rack carried by said bolts, clamp nuts threaded on said bolts, a valve plug, and a spring pressed handle carrying a locking pin to engage said rack.

3. A locking attachment Jfor valve plugs, consisting of a pair o'l bolts, a segmental rack xedly secured at the ends of said bolts, a pair of clamp-plates adjustably mounted on said bolts, a valve-plug, and a spring pressed handle connected with the plug and carrying a locking pin to engage the rack.

4. A locking attachment for valve plugs consisting of a pair of bolts, a segmental rack iXedly secured at the ends of said bolts, a pair of clamp plates adjustably mounted on said bolts, a valve-plug, and a non-rotative spring-pressed handle connected with the plug and carrying a locking pin to engage the rack.

5. A locking attachment for valve plugs consisting of a pair of bolts, an L-shaped plate having a segmental rack fiXedly secured at the ends of said bolts, ring-shaped clamp-plates adjustably mounted on said bolts, and a spring pressed handle connected with the plug and having a locking pin to engage the rack.

6. rIhe combination with a valve casing of a valve locking attachment consisting of a pair of bolts, a segmental rack fixedly secured at the ends of said bolts, a pair of clamp-plates adjustably mounted on said bolts and embracing the casing, a valve plug within the casing, and a spring-pressed handle connected to the plug and having a locking pin to engage the rack.

ln testimony whereof I alix my signature in presence of two witnesses.

CHARLES A. PATTERSON.

Witnesses:

ERNEST B. CLARK, HARRY C. HAZARD.

Uopies of this patent maybe obtalined for ve cents each, by addressing the "Commissioner of Patents. Washington, D'. 0'. 

